What happens:

using [ /data ] to change:

• a banner's pattern and/or pattern color
• a sign's text
• structure block bounding box and gui (unlike the others, this change is not corrected on reload)

using [ /data get ], the returned nbt shows the correct (updated) nbt.
Middle-clicking the banner gets the wrong (old) item in inventory.

What is expected to happen:

The visuals update according to the nbt instantaneously without the need of re-logging.

How to reproduce:

Banner:

1. Place any banner.
2. use a command to change the patterns:

   /data merge block ~-1 ~1 ~ {Patterns:[{Pattern:"bs",Color:5}]}
   

3. The texture doesn't update.
4. Relog. It is magically fixed!

End Crystal and area effect cloud:

1. Place an entity.
2. change the pos using [/data].
3. Position only changes after relog.